Avimech Dragonfly DF-1

The Avimech Dragonfly DF-1 is an American helicopter produced by Avimech International Aircraft, Inc. of Tucson, Arizona. Originally developed in Switzerland, the aircraft is supplied complete and ready-to-fly.

Design and development
The DF-1 was designed to comply with the US FAR 103 Ultralight Vehicles aircraft rules, including the category's maximum empty weight of 254 lb. The aircraft has a standard empty weight of 234 lb. It features a single main rotor and tail rotor, a single-seat, open cockpit without a windshield, skid landing gear with ground handling wheels.

The rotor is driven by tip jets fueled by hydrogen peroxide, which emits only water vapour and oxygen as exhaust products. The tail rotor is fitted only for directional control as it is not required to counteract torque, as the tip jet system does not require torque compensation.

The aircraft fuselage is made from steel and aluminum tubing. Its two-bladed rotor has a diameter of 19.7 ft. The aircraft has a typical empty weight of 234 lb and a gross weight of 794 lb, giving a useful load of 560 lb.